now in other news, seven afghan policemen have been killed in southern afghanistan. attack happened in lashkar, an area due to be handed over to afghan control later this week. it also coincided with the departure of america's top commander, general petraeus, who is leaving to become head of the cia. u.s. marine corps general john allen will take over command of the nato-led forces in afghanistan. the crew of the space shuttle "atlantis" has said a final farewell to colleagues on board the international space station. "atlantis" will undock early on tuesday and is aiming to land back on earth on thursday. its four career members floated through the lock ready for the last trip of the shuttle program. in libya, the struggle continues between pro and taken qaddafi forces with rebels claiming they've retain control of the key oil town of brager. according to a rebel spokesman, the bulk of qaddafi's troops retreated westward. at the same time, rebels in the western city say they're preparing for fresh offensive. outgunned by qaddafi's better equipped forces, they're bein